Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
nang co » nang cao, nang doc, nang noi
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
sac ky » sai ky
nang o » nang ho, nang ro, nang x
cac lo » cac lop, cac co, cac bo
lo va » lo van, lao va, ly va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sac ky) or (cac ky)) ((nang o) OR (nang co)) hoi. hieu va cac lo va danh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sac ky) OR (cac ky)) ((nang o) OR (nang co)) hoi. hieu va cac lo va danh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sac ky) or (cac ky)) ((nang o) OR (nang co)) hoi. hieu va cac lo va danh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sac ky) or (cac ky)) ((nang o) OR (nang co)) hoi. hieu va cac lo va danh vai cua tre*.